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(Modei.)

G. E. BOWER.

LOCK AND LATCH COMBINED.

I .Illllllf!l [N'VENTOR 33, 41 3/ Jla/rm WITNESSES;

ATTORNEYS.

UNlTED STATES PATENT @FFICE.

GEORGE E. BOWER, OF AUBURN, NEW YORK, ASSIGNOR TO HIMSELF AND CHRISTOPHER BREESE, OF SAME PLACE.

LOCK AND LATCH COMBINED.

.BPECIPICATION forming part of Letters Patent No. 333,440, dated December 29, 1885.

' Application filed April 21, 1885. Serial N0.162,934. (Model) To (ZZZ whom it may concern.-

Be it known that I, GEORGE E. BOWER, of Auburn, in the county of Cayuga and State of New York, have invented anew and Improved Lock and Latch Combined, of which the following is a full, clear, and exact description.

My invention relates to looks and la ches for doors or other opening and closing structures, and more particularly to that class known 1 as mortise looks or latches.

The object of the invention is to provide a simple, durable, and efficient lock and latch, which may quickly be adjusted to serve either as a lock or latch, the construction providing for varying keys, so that each latch,when adjusted as a lock, can be opened from the outside only by its own key.

The invention consists in particular constructions and combinations of parts of the lock and latch, all as hereinafter fully described and claimed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a sectional plan view of my improved lock and latch and portion of a door to which it is applied. Fig. 2 is a vertical sectional elevation thereof. Fig. 3 is a faceview from the inside of the door and with the lockspindle in section and the inside knob shown in dotted lines, and Figs. 4, 5, 6, and 7 are detail views of parts of the lock.

The letter A indicates the lock-case, which 3 5 is a cylindrical tube of metal adapted to fit a bore, 1), made edgewise in the door B, and the case has an end flange, a, through which the screws a pass into the door for holding the lock-case thereto.

0 The letter 0 indicates the bolt, which has an outer part or head, 0, which quite snugly fits the inside of the case A,to steady the bolt-catch D, formed on the head a, and the bolt has a stem portion, E, which extends backward or 5 inward, and has a curved or half-round end, E, which is provided with upper and lower or opposite lugs, e e, on each side, which lugs are acted upon by the shoulders f f of the tumbler F, Fig. 4, which is placed on the spindle G, to which the knobs g g are attached. The

spindle G passes through the case A, and also through a round hole made in the opposite side parts, h h, forming the inner slotted end of a frame piece or block, H, which snugly fits the interior of the case A.

The slot h of the block H, in which the tumbler F is placed on the spindle G, serves as a guide to the tumbler, and also as alateral guide to the back end, E, of the bolt 0, as the opposite pair of bolt-lugs, e e, are fitted between the sides h of the block H, which are long enough to prevent escape of the lugs e from slot h when the bolt is moved inward, which may be done by turning the knob-spindle either way, the opposite shoulders,ff,of the tumbler F acting alike on either the upper r or lower pair of opposite lugs, e 6. (See Figs. 1 and 2.)

A spring, I, held at one end, preferably in a recess, 13, of the bolt-head, acts between the head and block H, to force the bolt outward to project the catch D from the casing.

The block H has a recess, J, in which is journaled by a pin, k, the key-wheel K, and a spring, L, fixed at one end to the pin and at the other end to the block H, throws the keywheel around to its normal position, where it is stopped by the contact of a stud, Z, on the wheel striking a stud, l, fixed to the block H, so that the teeth 7c on wheel K will stand in proper relation to the toothed or notched key M, presently described.

Directly opposite to and parallel with the knob-spindle G is fitted in the case A and block Hthe cylindrical key-barrel N, in which 85 is out a lengthwise slot, a, which normally faces the key-wheel K, so that whenthe flat key M is passed into slot a with its teeth at facing the key-wheel, and is pushed inward from the outside of the door B, as represented in Fig. l, the teeth at of key M will engage the teeth k of wheel K and turn said wheel until the fiat cut-away portion m of the edge of the wheel stands opposite the edge on of the shank of the key, so that no part of the key-wheel will then project into the slot 11, of the key-barrel, which then may be turned freely by turning the key, it being understood that the key-wheel normally projects into the slot a, (see Figs. 2 and 3,) and prevents turn- 100 ing of the key-barrel until the key-wheel is turned by the key to carry its flat side or portionm into line with or parallel with the outside of the key-barrel, as above described.

On the knob'spindle G is fitted by its collar 0 the plate 0. which turns with the spindle G and normally projects toward the key-barrel N, and on the key-barrel is fitted by its collar 1), and so as to turn freely or independently of the barrel, the quadrant-shaped plate P, which has a stem or finger-piece, Q, and has fixed to its outer face next its bearing the lug q.

Outside of the plate P is fixed to the keybarrel N by a pin, r, and so as turn with the barrel, the collar or washer R, which has fixed to its inner face the lug T, which lies in the same vertical plane as the lug g on plate Q, so that when the key-barrel N is turned by the key M, as above explained, the lug 1' will strike the lug g on plate P, and turn said plate so that the convexed edge S of the plate P may be swung either into or out of engagement with the concavcd edge '1 of the plate 0, to prevent turning of the knob-spindle and withdrawal of the boltcatch D from the easing, or to allow these movements at will.

The key-barrel plate P is shown in outside face view in Fig. 5, and the collar R, by which the plate P may be turned by the aid of the key, is shown in outside and inside face view, respectively, in Figs. 6 and 7.

It will be understoodthat the plates 0 P are applied to the knob-spindle and key-barrel, respectively, at the inside face of the door,

and that the door is bored laterally to permit passage of the spindle and key-barrel, as shown in Fig. 1.

The operation is as follows: To set the lock so that its bolt 0 and catch D may be thrown back by turning either the inside knob, g, or outside knob, y, it only is necessary to swing the plate P around on the barrel Nto the position shown in dotted lines in Fig. 3, where it will be stopped by the contact of the lug q with the lug ron collar R, and the convex edge S will be swung away from the knobspindle plate 0, so that the bolt maybe drawn back, the lock thus serving as a latch, allowing the door to be opened from the outside without using a key, and when 'theknob-spindleG is turned to draw the bolt the plate 0 will be free to swing either upward, as in dotted lines, Fig. 3, or downward for about the same distance, according to the way the knobs To look the door, it only'is' may' be turned. necessary to swing the plate P over so its edge S engages the edge T of plate 0, as in full lines in Fig. 3, which will prevent turning of the spindle by either knob, and the plate P can be swung over in this way before a person leaves an apartment, so that when the door is closed it will be locked, the latch D being free to move backward or'inward as itstrikes the catch-plate on the casing. To unlock the door from the inside, the plate P will be swung over by taking hold of its finger-piece Q, and to unlock the door from the outside the key M will be passed into the barrel N to turn key-wheel K to bring its flat portion m opposite the barrel, which then may be turned by the key, so that the stud r on the barrel-collar R will strike the stud g on plate P, and swing its convexed edge S away from the concaved edge T of plate 0, and leave the spindle G free to turn for drawing back the bolt. The plate P may of course be swung back by the key for locking the door from the outside. When the key is withdrawn, the spring L turns the key-Wheel K back again to normal position, ready for the next use of the key.

It is evident that the peripheral teeth k of the keywheel K maybe arranged at varying distances apart in different locks, and the key M be made with teeth m to correspond; hence each lock will or may require its own key to open it, as will readily be understood.

The lock shown is a mortise-lock; but the lock-and-latch mechanism shown and described may be used with rim locks to be attached to the face of the door.

Having thus described my invention,what'[ claim as new, and desire to secure by Letters Patent, is-

1 The combination, with a lock-casing, of a bolt operated by a knob-spindle, a key-barrel carrying devices for locking the knobspindle, and a notched wheel engaging the'keybarrel and adapted to be revolved by a suitable key, as set forth.

2. A lock and latch comprising the case, the bolt, the knob-spindle fitted with a tumbler acting to draw the bolt, the key-barrel, a plate fitted on the knob-spindle and having a curved edge, and a plate on the key-barrel having a correspondingly-curved edge adapted to interlock with the spindle-plate, substantially as herein set forth.

3. A lock and latch comprising a case, A, bolt 0, knob-spindle G, tumbler F, key-barrel N, slotted at n, the key-wheel K, toothed at k and cut away peripherally, as at m, a key, M, toothed at m to correspond with teeth is of wheel K, and adapted to the 'key-barrel, a spring returning the key-wheel to normal position as .the key iswithdrawn, a plate, 0, having a curved edge, T, and fitted onand to turn with the knob-spindle, a plate, P, having curved edge S, and fitting 'loosel y on key-barrel N, and also having a lug, q, and a collar, R, 'fixed to barrel N, and having a lag, r, substantially as herein set forth.

4. The combination, with the block H, the key-barrel N, and key-wheel K, of the stops Z l, substantially as herein set forth.

GEORGE E. BOWEB.

PATRICK H. HERRON, 'Tnos. J. CHURCH. 

